Sensor unit



FIG. 1 is a perspective view of a sensor unit showing our new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is an end elevational view taken from the left of FIG. 1. 

The ornamental design for a sensor unit, as shown and described. 